Alright, let's work through 72253607 times 90955574 step by step
72253607 × 90955574 = 90955574 × (72253607)
+ 90955574 × 7 that is equal 636689018
+ 90955574 × 00 that is equal 0
+ 90955574 × 600 that equals 54573344400
+ 90955574 × 3000 that equals 272866722000
+ 90955574 × 50000 producing 4547778700000
+ 90955574 × 200000 resulting in 18191114800000
+ 90955574 × 2000000 resulting in 181911148000000
+ 90955574 × 70000000 that results in 6366890180000000

= 6571868298255418
